Asia-Pacific Journal of Chemical Engineering
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2024
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IF 1.4
Jianke Tang,Qiaoling Li,Rongqian Meng,Yanfeng Xue,Shengjian Zhang,Shengjuan Shao
Using the prepared Ag 3 PO 4 /WO 3 ·H 2 O composite as the matrix, AgI nanoparticles were introduced onto the surface of Ag 3 PO 4 to construct AgI/Ag 3 PO 4 /WO 3 ·H 2 O ternary heterojunction photocatalysts. The ternary composite photocatalysts exhibited higher photocatalytic degradation activities for rhodamine B (RhB) and tetracycline hydrochloride (TCH) than those of binary Ag 3 PO 4 /WO 3 ·H 2 O and AgI/WO 3 ·H 2 O photocatalysts and individual AgI, Ag 3 PO 4 , and WO 3 ·H 2 O photocatalysts. After exposure to visible light for 12 and 24 min, the removal efficiencies of RhB and TCH by the S2-50% photocatalyst (50% molar percentage of AgI to Ag 3 PO 4 ) reached 98.0% and 85.3%, respectively. After four degradation cycles, the removal efficiency of RhB by S2-50% remained at 93.2%, significantly surpassing that of the Ag 3 PO 4 /WO 3 ·H 2 O photocatalyst. The enhanced photocatalytic performance of the AgI/Ag 3 PO 4 /WO 3 ·H 2 O photocatalyst is primarily attributed to the formation of Z-scheme/conventional Type II heterojunctions, which facilitate spatial separation of the photogenerated electrons and holes while maintaining the strong reductive capabilities of electrons in the AgI conduction band.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2025
·
IF 4.7
Lei-ting SHEN,Yu LIU,Juan-lang GUO,Qiu-sheng ZHOU,Tian-gui QI,Zhi-hong PENG,Gui-hua LIU,Xiao-bin LI
The leaching of sulfuric acid converted product of scheelite in NH 3 ·H 2 O−NH 4 HCO 3 solution was systemically studied to improve sulfuric acid conversion−ammonium salts leaching technology route for ammonium paratungstate production. The results showed that the WO 3 leaching efficiency was about 99% under optimal conditions of 350 r/min, liquid-to-solid ratio of 3 mL/g, 1 mol/L NH 4 HCO 3 , 4 mol/L NH 3 ·H 2 O, 25 °C, and 15 min. During the leaching, CaSO 4 almost had no change and was still in a banding or rod-like shape in short leaching time, while conglobate CaCO 3 was gradually formed on the CaSO 4 surface. A secondary reaction might occur between CaSO 4 and WO 4 2− , which could be restrained by a certain amount of CO 3 2− in the solution. There was no CaCO 3 phase determined by XRD in leaching residue of converted product for scheelite concentrate under optimal conditions, which was different from that for synthetic scheelite. The leaching process could be explained by neutralization reaction of H 2 WO 4 and solid transformation of CaSO 4 in NH 3 ·H 2 O−NH 4 HCO 3 solution.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 6
·2505-2514
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IF 2.7
Zeyu Guan,Yuxiao Weng,Jiankun Li,Shiyi Li,Keyu Wang,Linfeng Lei,Yixing Wang,Linzhou Zhuang,Zhi Xu
Proton exchange membrane water electrolysis (PEMWE) can be coupled with renewable energy power generation technology and is considered to be a highly promising hydrogen production technology. However, the acidic electrolyte environment, as well as the numerous sulfonic acid groups on the proton exchange membrane surface, can seriously corrode the oxygen evolution reaction (OER) catalyst and even cause deactivation. To develop an efficient acidic OER catalyst, the IrOx/WO3 heterostructure OER catalyst was prepared by a hydrothermal-calcination method. The coordination environment of IrOx was regulated through the electronic rearrangement effect, improving the OER activity and stability of the catalyst in acidic media. The prepared IrOx/WO3 exhibits excellent OER activity in 0.5 M H2SO4, with an overpotential of only 260 mV to achieve a current density of 10 mA cm−2 and a mass activity of 176.8 A gIr−1. It can stably operate for over 12 hours at a current density of j = 10 mA cm−2.
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Materials Today Chemistry
·
2024
·
IF 6.7
Bin Cheng,Zhenhu Cao,Li Liao,Wentao Chen,Hongtao Cao,A.A. Rogachev,M.A. Yarmolenko,Hongliang Zhang
With the rapid advancement of electrochromic technology, providing quasi-solid-state electrolytes that offer superior performance and lower costs holds significant promise for practical applications of electrochromic devices. Herein, a strategy of employing a facile fabrication method for quasi-solid electrolyte and quasi-solid-state electrochromic devices by in-situ UV curing, aims to enhance interfacial interactions, thereby accelerating response time and improving cycling stability. After 120 s of UV polymerization, the electrolyte with PEO accounting for 40 wt% of PEGDA and PEO mixture exhibited excellent conductivity (2.04 × 10 −3 S cm −1 ), thermal stability, optical transmittance (＞85 % @633 nm) and interface bonding strength (0.11 Mpa). These remarkable characteristics lay the foundation for fabricating a quasi-solid-state WO 3 –NiO ECD with an ultra-fast response time of 0.96 s/3.48 s and excellent long-term cycling stability of more than 20000 cycles. This outcome introduces a novel approach to fabricating high-performance electrochromic devices, significantly enhancing their potential applications across various fields.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Ya-Nan Wang,Yaxin Guo,Jinsong Peng,Jianwei Zhao,Lei Yang,Haiyan Song,Chunxia Chen
s Photocatalytic H 2 O 2 production represents a sustainable and promising avenue for energy and environment. Photoproduction of H 2 O 2 in seawater is potentially an alternative to meet the needs of H 2 O 2 utilization in ocean, while with challenges of competitive ions influence and unsolved photocatalytic mechanism. Herein, we constructed a S-scheme heterojunction with the lamellated WO 3 coated CdS semiconductors for photoproduction of H 2 O 2 in actual seawater. Fragmented WO 3 uniformly spread on surface of dispersed CdS spheres by two steps including calcination and ultrasound. Photocatalyst achieved considerable 1.00 mmol·g cat −1 ·h −1 of H 2 O 2 productivity in seawater without electron-proton donors and pure O 2 , 9.3 % of apparent quantum yield (AQY), as well as good reusability. A co-catalysis concept was proposed to explore specific role of ions in seawater on H 2 O 2 photoproduction. S-scheme heterojunction contributed to migration of electrons and holes on interface between WO 3 and CdS, and further promoted separation of photocarriers, and further opened another channel for H 2 O 2 generation. Accumulated electrons in conduction band (CB) of CdS involved in the main route of two-electron reduction of O 2 for H 2 O 2 production, also promoted generation of •O 2 - for opening the auxiliary route. WO 3 /CdS heterojunction provided fundamentals and opportunities for H 2 O 2 production and applications in abundant seawater as a sustainable way.
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Journal of Energy Chemistry
·
2024
·
IF 14
Zhijie Zhang,Xuesheng Wang,Junyi Qian,Jiayue Xu
Heterojunction construction, especially S-scheme heterojunction, represents an efficient universal strategy to achieve high-performance photocatalytic materials. For further performance stimulation of these well-designed heterojunctions, modulating the interfacial internal electric field (IEF) to steer dynamic charge transfer represents a promising approach. Herein, we realized the precise regulation of Fermi level ( E F ) of the oxidation semiconductor (mesoporous WO 3− x ) by tailoring the concentration of oxygen vacancies (V O ), maximizing the IEF intensity in Cs 2 CuBr 4 @WO 3− x (CCB@WO 3− x ) S-scheme heterojunction. The augmented IEF affords a robust driving force for directional electron delivery, leading to boosted charge separation. Hence, the developed CCB@WO 3− x S-scheme heterojunction demonstrated outstanding photocatalytic CO 2 reduction performance, with the electron consumption rate ( R electron ) up to 390.34 μmol g −1 h −1 , which is 3.28 folds higher than that of pure CCB. An in-depth analysis of the S-scheme electron transfer mode was presented via theoretical investigations, electron spin resonance (ESR), photo-irradiated Kelvin probe force microscopy (KPFM), and in-situ X-ray photoelectron spectroscopy (XPS). Finally, the CO 2 photoconversion route was explored in detail using in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and DFT theoretical calculations.
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LANGMUIR
·
2025
·
IF 3.9
Dexi Yu,Yuhong Lin,Wenhui Zhou,Xiaoyi Wang,Zhenzhen Yu,Yidong Hou,Masakazu Anpo,Jimmy C. Yu,Jinshui Zhang,Xinchen Wang
Photocatalytic oxidation of benzene to phenol using molecular O2 is one of the most promising sustainable approaches for the green synthesis of phenol. Introducing oxygen vacancies (OVs) on semiconductor surfaces by defect engineering is a promising strategy to enhance the efficiency of benzene oxidation to produce phenol due to the unique functions of OVs in facilitating the charge separation and activation of molecular O2. Herein, a vacuum-sealed annealing strategy has been well developed to generate abundant surface OVs on semiconductors, such as WO3. The well-sealed quartz vial creates a well-controlled low-pressure condition for the formation of OVs without the need for external energy for maintaining the vacuum state. Moreover, the gaseous species generated during the thermal annealing process help mitigate stress-induced defects, particularly bulk defects. The vacuum-sealed annealed WO3 with sufficient OVs and reduced bulk defects shows a better photocatalytic performance in the one-step oxidation of benzene to phenol with O2, compared to the WO3 synthesized through thermal annealing in Ar and H2 atmospheres. The present vacuum-sealed annealing strategy is found to be further applicable to engineer a wide range of semiconducting photocatalysts with abundant OVs to optimize their properties for efficient photocatalysis and other OV-promoted systems.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
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IF 8
Qiaobo Liao,Qiannan Sun,Chenkai Cao,Jinwu Hu,Yinsheng Wang,Shengjuan Li,Jingcheng Xu,Guisheng Li,Yongheng Zhu,Ding Wang
Detecting acetone is vital for both environmental safety and human health. However, many existing detection methods suffer from bulky equipment, complex processes, and limited efficiency. Metal oxide semiconductor (MOS) based gas sensors, particularly WO 3 , have gained attention due to their portability, cost-effectiveness, and sensitivity. In this study, we successfully synthesize a series of 1D hierarchical core-shell metal oxide semiconductor MOS@WO 3 structures (MOS: TiO 2 , WO 3 , and SnO 2 ) via a hydrothermal method employing self-assembly. Notably, the TiO 2 @WO 3 sensor exhibits an exceptional response value (R a /R g = 23.6) at a concentration of 50 ppm for acetone. It also demonstrates a rapid response recovery time (12/35.5 s) and a remarkably low detection limit, as low as 10 ppb (R a /R g = 1.29). This exceptional sensing performance is attributed to the large specific surface area , abundant oxygen vacancy , narrow bandgap, additional depletion layer of the heterostructure , and the main conduction channel in the shell of TiO 2 @WO 3 NCs. This study not only promotes acetone sensor development but also contributes to innovative layered core-shell material fabrication methodologies.
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Nanomaterials
·
2024
·Vol. 14
·期 8
·719
·
IF 4.4
Xueyan Li,Zeyi Wu,Xiangyu Song,Denghua Li,Jiajia Liu,Jiatao Zhang
Nowadays, metal oxide semiconductor gas sensors have diverse applications ranging from human health to smart agriculture with the development of Internet of Things (IoT) technologies. However, high operating temperatures and an unsatisfactory detection capability (high sensitivity, fast response/recovery speed, etc.) hinder their integration into the IoT. Herein, a ternary heterostructure was prepared by decorating WO3nanoplates with Au and SnO2nanoparticles through a facial photochemical deposition method. This was employed as a sensing material for 3-hydroxy-2-butanone (3H-2B), a biomarker ofListeria monocytogenes. These Au/SnO2–WO3nanoplate-based sensors exhibited an excellent response (Ra/Rg= 662) to 25 ppm 3H-2B, which was 24 times higher than that of pure WO3nanoplates at 140 °C. Moreover, the 3H-2B sensor showed an ultrafast response and recovery speed to 25 ppm 3H-2B as well as high selectivity. These excellent sensing performances could be attributed to the rich Au/SnO2–WO3active interfaces and the excellent transport of carriers in nanoplates. Furthermore, a wireless portable gas sensor equipped with the Au/SnO2–WO3nanoplates was assembled, which was tested using 3H-2B with known concentrations to study the possibilities of real-time gas monitoring in food quality and safety.
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ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Guozhen He,Tao Dong,Zhaochu Yang,Bjo̷rn Torger Stokke,Zhuangde Jiang
Biofouling deteriorates the performance of sensors operated in biofluids. Protein adsorption is believed to be the first step of biofouling, which also reduces biocompatibility by further inducing cell adhesion, platelet activation, and even inflammation. Current studies of antifouling coatings are focused on polymers and hydrogels, which have succeeded in remaining resistant to protein adsorption, but their application on sensor electrodes is limited due to low conductivity and biocompatibility. Here, we report a spontaneous antibiofouling strategy for sensor electrodes by controlling oxygen vacancies in WO3 nanosheets. Irreversible adsorption of proteins was reduced by 76% in unprocessed human plasma when electrodes were coated with WO3 rich in surface oxygen vacancy. These electrodes maintained 91% of the initial current density after 1 month of incubation in human plasma.
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ACS Sensors
·
2025
·
IF 9.1
Chuanxuan Zhou,Shaowei Li,Fuchao Yang,Zhiguang Guo
Ultrasensitive detection of triethylamine (TEA), a characteristic volatile in seafood, is particularly important for food safety and human health. The preparation of nanosensing materials with special structures is an important step toward high-performance TEA detection. This study introduces a novel method of loading noble metal catalysts onto the inner walls of WO3 macroporous nanofibers (MNFs) to prepare high-performance TEA sensing materials by using core–shell nanospheres with glucose-coated Ag particles as sacrificial templates. After high-temperature calcination, WO3 MNFs loaded with Ag particles on the inner wall (Ag-WO3 MNFs) were obtained by decomposition of organic components and oxidation of W precursors. The abundant porous structure, large number of oxygen vacancies and strong sensitizing effect of Ag particles give Ag-WO3 MNFs excellent sensing performance. Gas sensing measurements reveal that 1.5% Ag-WO3-based sensor responds to 1 ppm TEA with a response time of 1 s, a response value as high as 1054.17 (Ra/Rg), and a low detection limit (12.8 ppb) at 185 °C. The adsorption process of gas molecules on the surface of Ag-WO3 MNFs is revealed using density-functional theory (DFT) calculations. The integration of this distinctive design concept with an in-depth mechanistic investigation offers a novel strategy for engineering high-performance TEA sensing materials.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhaozhu Qu,Hongyu Duan,Xiaofei Zhang,Xiaohui Sun,Yuan Chen,Peitao Xu,Xiang Zhang,Bo Wang,Nana Liu,Guohua Wu,Xiangwei Wang,Xuyang Zhang
Tungsten oxide (WO 3 )-based electrochromic materials have demonstrated significant potential for utilization in green energy applications, particularly in smart windows for buildings and thermal management in electric vehicles. However, the scalable production of environmentally friendly, low-cost WO 3 films with competitive electrochromic properties remains challenging. In this study, a facile and scalable sol-gel method was developed for the fabrication of Ti-doped WO 3 films with a crystal-amorphous composite structure, using nanocellulose as a bio-template. The introduction of a green renewable nanocellulose template resulted in the concurrent formation of a slit-shaped mesoporous morphology and oxygen vacancies. This process served to enhance the specific surface area and charge carrier concentration. It is noteworthy that the nanocellulose also modulated the film crystallization behavior under identical annealing conditions, generating optimized diffusion channels and abundant active sites. The resulting porous WO 3 films exhibited superior electrochromic performance, which provides viable approaches for pore-engineering strategies and crystallinity control in sol-gel derived porous WO 3 films. This offers practical references for processing methodology and structural design considerations.
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